Tubular coupler



FIG. 1 is a perspective view looking at the top and right side of the tubular coupler in an open condition;

FIG. 2 is a top view of the tubular coupler in a closed condition;

FIG. 3 is a side elevation looking at the left side of the tubular coupler in a closed condition;

FIG. 4 is a front elevation looking at the front of the tubular coupler in a closed condition;

FIG. 5 is a side elevation looking at the right side of the tubular coupler in a closed condition;

FIG. 6 is a rear elevation of the tubular coupler in a closed condition; and,

FIG. 7 is an inverted plan view looking at the bottom of the tubular coupler in a closed condition. 

The ornamental design for a tubular coupler, as shown and described. 